Driving method and driving circuit of display panel and display device

Abstract

The invention provides a driving method of a display panel, a driving circuit and a display device.In the driving method of the display panel, the display panel is switched to a first driving mode according to a trigger instruction, and in the first driving mode, the proportion of an invalid time sequence period and an effective time sequence period in each frame scanning period is adjusted, the invalid time sequence period is increased, and the effective time sequence period is increased; and adjusting the output frequency of the data signal according to the ratio of the invalid time sequence period to the effective time sequence period, and outputting the data signal according to the adjusted output frequency in the effective time sequence period, thereby increasing the data signal pushing frequency of the effective time sequence period, improving the alternating frequency of bright and dark lines, and improving the transmission efficiency of the data signal under the condition of mobile visual observation frame drop. In addition, due to the fact that the charging time of the data signals in the effective time sequence period is compressed, the parasitic capacitance difference of the two pixel units of the pixel unit group is reduced, the pixel voltage difference of the two pixel units is reduced, and the vertical bright and dark lines are further reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of display panels, and in particular relates to a driving method, a driving circuit and a display device of a display panel. Background Art

[0002] In the HSD (Half Source Driving) pixel array, two adjacent pixel units in the horizontal direction share a data line. Compared with the traditional pixel array, the number of data lines can be reduced by half. At the same time, adjacent pixel units in the same row are connected to different scan lines, and pixels in the same row that are one pixel apart are connected to the same scan line. Therefore, the number of scan lines is doubled compared with the traditional pixel array.

[0003] Since the pixel electrodes of the HSD pixel array are of a "long-short-hand" design, the pixel electrodes that are close to each other can be understood as short-hand electrodes, and the pixel electrodes that are far from each other can be understood as long-hand electrodes. Figure 1 As shown, there is a difference between the parasitic capacitance Cgs-L of the long-hand pixel unit and the parasitic capacitance Cgs-S of the short-hand pixel unit. From the feed voltage formula Vth=Cgs*(Vgh-Vgl) / C-Total, it can be seen that the feed voltages Vth-L and Vth-S of the long-hand pixel unit and the short-hand pixel unit are also different. Finally, the long-hand pixel voltage Vpixel-L and the short-hand pixel voltage Vpixel-S used to realize the picture display are different.

[0004] The polarity inversion mode of the data signal is column flipping, that is, in the i-th frame time, the data signals of the N, N+2, N+4... columns are negative polarity, and the data signals of the N+1, N+3, N+5... columns are positive polarity. In the i+1-th frame time, the data signals of the N, N+2, N+4... columns are positive polarity, and the data signals of the N+1, N+3, N+5... columns are negative polarity. The polarity of each column of the i-th frame and the i+1-th frame is reversed.

[0005] During the i-th frame, the Vpixel-L of the long-hand pixel unit connected to the positive polarity is less than the Vpixel-S of the short-hand pixel unit, and the long-hand pixel unit is darker, while the short-hand pixel unit is brighter. The Vpixel-L of the long-hand pixel unit connected to the negative polarity is greater than the Vpixel-S of the short-hand pixel unit, and the long-hand pixel unit is brighter, while the short-hand pixel unit is darker. From a macroscopic perspective, you can see that bright vertical lines and dim vertical lines alternate with each other, that is, vertical light and dark lines. During the i+1-th frame, the polarity of each column of data is reversed, and the bright lines and dark lines swap positions.

[0006] When the human eye is not moving, the problem of alternating bright and dark lines caused by the inversion of data polarity columns can be offset in time, that is, a column is bright for half of the time and dark for the other half. Since the time integrals cancel each other out, the bright and dark line display abnormality is not seen at this time. However, when the human eye is moving, the frame rate will decrease. When the frame rate is less than 24Hz, obvious display abnormalities will be seen, and the problem of bright and dark lines in the vertical direction will appear. Summary of the invention

[0007] The object of the present invention is to provide a method for driving a display panel, aiming to reduce the problem of vertical bright and dark lines existing in a conventional display panel driving method when the display panel is viewed in motion.

[0008] A first aspect of an embodiment of the present invention provides a method for driving a display panel, wherein the display panel comprises a plurality of data lines, a plurality of scan lines and pixel units arranged in an array, wherein two adjacent pixel units in a row constitute a pixel unit group, and adjacent pixel unit groups are respectively connected to two adjacent data lines, and two adjacent pixel units in a row are connected to the same data line and are respectively connected to two adjacent different scan lines, and two diagonal pixel units in two pixel unit groups in the same column are respectively connected to two adjacent different scan lines, and two pixel units in the same row that are separated by one pixel unit are connected to the same scan line;

[0009] The driving method of the display panel includes:

[0010] According to the trigger instruction, the first driving mode is switched to, and in the first driving mode, the ratio of the invalid timing period to the valid timing period in each frame scanning period is adjusted, wherein the valid timing period is ahead of the invalid timing period, and the ratio of the invalid timing period to the valid timing period is k, 1 <k<2;

[0011] The output frequency of the data signal is adjusted according to the ratio of the invalid timing period to the valid timing period, and the data signal is output according to the adjusted output frequency within the valid timing period, wherein the output frequency of the data signal is f=f0*k, wherein f is the initial frequency of the data signal.

[0012] Optionally, the display panel driving method further includes:

[0013] In the first driving mode, the polarity of the data signal output to each column data line is switched;

[0014] In the same frame scanning period, the polarities of two data lines in adjacent columns are opposite, and in adjacent scanning periods, the polarities of the data lines in the same column are opposite.

[0015] Optionally, the display panel driving method further includes:

[0016] Switching to the second working mode according to the trigger instruction, in the second driving mode, switching the polarity of the data signal output to each column data line, wherein the plurality of columns of data lines are divided into n data line groups, each data line group includes m data lines with the same number of columns, and m is greater than 2;

[0017] In the i-th frame scanning period, the polarity of the data signal of the first column data line of each data line group is the first polarity, the polarity of the data signal of the second column data line to the m-th column data line of each data line group is the second polarity, and the first polarity and the second polarity are opposite polarities;

[0018] In the i+1th frame scanning period, the polarity of the data signal of the first column data line of each data line group is the second polarity, and the polarity of the data signal of the second column data line to the mth column data line of each data line group is the first polarity, and i is a positive integer.

[0019] Optionally, the display panel driving method further includes:

[0020] Switching to the third working mode according to the trigger instruction, and switching the polarity of the data signal output to each column data line in the third driving mode, wherein the multiple columns of data lines are divided into n data line groups, each data line group includes m data lines, the m values ​​of the jth data line group to the j+Kth data line group are different, the m values ​​of the jth data line group and the j+K+1th data line group are equal, and j and K are positive integers;

[0021] In the i-th frame scanning period, the polarity of the data signal of the first column data line of each data line group is the first polarity, the polarity of the data signal of the second column data line to the m-th column data line of each data line group is the second polarity, and the first polarity and the second polarity are opposite polarities;

[0022] In the i+1th frame scanning period, the polarity of the data signal of the first column data line of each data line group is the second polarity, and the polarity of the data signal of the second column data line to the mth column data line of each data line group is the first polarity, and i is a positive integer.

[0023] Optionally, the display panel driving method further includes:

[0024] A row scanning signal is outputted within the effective timing period, wherein an output frequency of the row scanning signal is the same as an output frequency of the data signal.

[0025] Optionally, the display panel driving method further includes:

[0026] When the row scanning signal is output row by row, the polarity of the data signal on the same data line is switched alternately.

[0027] Optionally, the display panel driving method further includes:

[0028] Switch to the fourth working mode or the fifth working mode according to the trigger instruction, wherein the fourth working mode includes the first working mode and the second working mode, and the fifth working mode includes the first working mode and the third working mode.

[0029] Optionally, the display panel driving method further includes:

[0030] The picture information of the display panel is obtained, and when the picture information is a pure color picture or a low grayscale picture, different trigger instructions are triggered to output so as to switch the working mode of the display panel.

[0031] A second aspect of an embodiment of the present invention provides a driving circuit for a display panel, the display panel comprising a plurality of data lines, a plurality of scan lines and pixel units arranged in an array, two adjacent pixel units in a row constitute a pixel unit group, adjacent pixel unit groups are respectively connected to two adjacent data lines, two adjacent pixel units in a row are connected to the same data line and are respectively connected to two adjacent different scan lines, two diagonal pixel units in two pixel unit groups in the same column are respectively connected to two adjacent different scan lines, and two pixel units in a row with one pixel unit interval are connected to the same scan line;

[0032] The driving circuit of the display panel includes a source driving circuit, a gate driving circuit and a timing controller, wherein the timing controller is connected to the source driving circuit and the gate driving circuit respectively, the source driving circuit is connected to a plurality of data lines of the display panel, and the gate driving circuit is connected to a plurality of scanning lines of the display panel;

[0033] The timing controller is used to control the gate driving circuit and the source driving circuit to implement the display panel driving method as described above.

[0034] A third aspect of an embodiment of the present invention provides a display device, comprising the display panel as described above and a driving circuit of the display panel, wherein the display panel is connected to the driving circuit of the display panel.

[0035] The beneficial effects of the embodiments of the present invention compared with the prior art are as follows: for a display panel of an HSD pixel array, in the driving method of the above-mentioned display panel, a switch is made to the first driving mode according to a trigger instruction, and in the first driving mode, the proportion of invalid timing periods and valid timing periods in each frame scanning cycle is adjusted, the invalid timing periods are increased, and the output frequency of the data signal is adjusted according to the proportion of the invalid timing periods and the valid timing periods, and the data signal is output according to the adjusted output frequency in the valid timing period, thereby increasing the data signal push frequency in the valid timing period, and improving the alternation frequency of bright and dark lines. In the case of moving visual observation of frame drop, vertical bright and dark lines will not be observed, and because the charging time of the data signal in the effective timing period is compressed, the difference in parasitic capacitance between the two pixel units of the pixel unit group is reduced, and the difference in pixel voltage between the two pixel units is reduced, thereby further reducing the vertical bright and dark lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 A schematic diagram of a first structure of a display panel provided in Embodiment 1 of the present invention;

[0038] Figure 2 A first flow chart of a method for driving a display panel provided in the first embodiment of the present invention;

[0039] Figure 3 A schematic diagram of a first waveform of a data signal provided in Embodiment 1 of the present invention;

[0040] Figure 4 A second waveform diagram of a data signal provided in the first embodiment of the present invention;

[0041] Figure 5 A second flow chart of the method for driving a display panel provided in the first embodiment of the present invention;

[0042] Figure 6 A second structural schematic diagram of a display panel provided in the first embodiment of the present invention;

[0043] Figure 7 A schematic diagram of a first structure of a display panel provided in Embodiment 2 of the present invention;

[0044] Figure 8 A second structural schematic diagram of a display panel provided in Embodiment 2 of the present invention;

[0045] Fig. 9 A third structural schematic diagram of a display panel provided in the second embodiment of the present invention;

[0046] Fig.10 A fourth structural schematic diagram of a display panel provided in Embodiment 2 of the present invention;

[0047] Fig.11 A schematic diagram of the structure of a display panel provided in Embodiment 3 of the present invention;

[0048] Fig.12 A schematic diagram of the structure of a display panel provided in Embodiment 4 of the present invention;

[0049] Fig.13 This is a schematic diagram of the structure of a display panel provided in Embodiment 6 of the present invention.

[0050] Among them, the reference numerals in the figures are:

[0051] 1. a display panel driving method; 2. a display panel; 21. a pixel unit; 22. a pixel unit group; 100. a gate driving circuit; 200. a timing controller; 300. a source driving circuit;

[0052] T1, valid timing cycle; T2, invalid timing cycle; STV, start signal; DATA, data signal. DETAILED DESCRIPTION

[0053] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] Embodiment 1

[0056] A first aspect of an embodiment of the present invention proposes a driving method for a display panel, wherein a display panel 2 includes a plurality of data lines, a plurality of scan lines, and an array-arranged pixel unit 21, wherein the plurality of data lines are arranged in sequence and spaced apart in a horizontal direction, and the plurality of scan lines are arranged in sequence and spaced apart in a vertical direction, the plurality of data lines are used for data signals DATA, and the plurality of scan lines are used for inputting row-on signals row by row.

[0057] Among them, Figure 1 As shown, two adjacent pixel units 21 in the same row constitute a pixel unit group 22, and the adjacent pixel unit groups 22 are respectively connected to two adjacent data lines, two adjacent pixel units 21 in the same row are connected to the same data line and are respectively connected to two adjacent different scan lines, two diagonal pixel units 21 in two pixel unit groups 22 in the same column are respectively connected to two adjacent different scan lines, and two pixel units 21 in the same row separated by one pixel unit 21 are connected to the same scan line.

[0058] The pixel unit 21 is connected to the data line and the scan line using a long-short hand structure. The polarity of the data signal DATA on the data line may be variable or constant during row-by-row scanning. Overall, by using the long-short hand structure, the data line can achieve positive and negative polarity reversal by flipping the columns.

[0059] That is, in the i-th frame time, the data signals DATA in the N, N+2, N+4 ... columns are negative polarity, and the data signals DATA in the N-1, N+1, N+3 ... columns are positive polarity. In the i+1-th frame time, the data signals DATA in the N, N+2, N+4 ... columns are positive polarity, and the data signals DATA in the N-1, N+1, N+3 ... columns are negative polarity. The polarity of each column of data in the i-th frame and the i+1-th frame is reversed.

[0060] During the i-th frame, the Vpixel-L of the long-hand pixel unit 21 connected to the positive polarity is less than the Vpixel-S of the short-hand pixel unit 21, and the long-hand pixel unit 21 is darker, and the short-hand pixel unit 21 is brighter. The Vpixel-L of the long-hand pixel unit 21 connected to the negative polarity is greater than the Vpixel-S of the short-hand pixel unit 21, and the long-hand pixel unit 21 is brighter, and the short-hand pixel unit 21 is darker. From a macroscopic perspective, it can be seen that bright vertical lines and dim vertical lines alternate with each other, for example Figure 1 As shown, the pixel units 21 in the first column present bright lines, the pixel units 21 in the second column and the pixel units 21 in the third column present dark lines, the pixel units 21 in the fourth column and the pixel units 21 in the fifth column present dark lines, and so on, that is, vertical light and dark lines. If the bright column of pixel units 21 is characterized as A, and the dark column of pixel units 21 is characterized as B, according to the column flipping method, the light and dark stripes are arranged according to the ABBAABBAABB rule, and the light and dark contrast between each two adjacent columns is high. Macroscopically, very rough vertical light and dark stripes are displayed, which can be clearly perceived by the human eye.

[0061] In order to reduce the problem of vertical bright and dark lines when shaking the head, in this embodiment, Figure 2 As shown, the driving method of the display panel includes:

[0062] S10. Switch to the first driving mode according to the trigger instruction, and in the first driving mode, adjust the ratio of the invalid timing period T2 to the valid timing period T1 within each frame scanning period, where the valid timing period T1 is ahead of the invalid timing period T2, and the ratio of the invalid timing period T2 to the valid timing period T1 is k, and 1 < k < 2.

[0063] As Figure 3 shown, in each frame of picture information, it includes the valid timing period T1 and the invalid timing period T2. During the pushing process of the data signal DATA, within the valid timing period T1, the data signal DATA has the effect of picture information, and within the invalid timing period T2, the data signal DATA does not push data and has no display effect.

[0064] In the initial state, the duration of the invalid timing period T2 is close to that of the valid timing period T1. Assume that the current frequency of the data signal DATA is 60 Hz, the frequency of the picture information is 60 Hz, and the frequency of the alternating bright and dark lines is 30 Hz. At this time, when observing visually by moving the viewing angle, due to the influence of moving frame dropping, the frequency of the picture seen by the human eye is less than 24 Hz, and obvious bright and dark lines will be seen.

[0065] Therefore, when improving the bright and dark line problem, switch to the first working mode after receiving the trigger instruction. In the first working mode, by increasing the invalid timing period T2, without changing the time of one frame scanning period, increase the ratio of the invalid timing period T2 and compress the ratio of the valid timing period T1. Assume that the scanning period time of each frame is T. To ensure that within each frame period, the data signal DATA has sufficient charging output time and avoid insufficient charging affecting the display effect due to too short time, while taking into account the bright and dark line problem, the ratio range of the invalid timing period T2 to the valid timing period T1 is defined as 1 < k < 2, that is, the invalid timing period T2 is greater than the valid timing period T1, but at most does not exceed 2 / 3 of one frame period time, that is, the duration range of the invalid timing period T2 is between 1 / 2 and 2 / 3, and the duration range of the valid timing period T1 is between 1 / 3 and 1 / 2.

[0066] S20. Adjust the output frequency of the data signal DATA according to the ratio of the invalid timing period T2 to the valid timing period T1, and output the data signal DATA at the adjusted output frequency within the valid timing period T1, where the output frequency of the data signal DATA is f = f0 * k, where f is the initial frequency of the data signal DATA.

[0067] During the driving process of the display panel 2, the output frequency of the data signal DATA is adjusted according to the k value. The output frequency of the adjusted data signal DATA is f=f0*k, that is, compared with the frequency of the original data signal DATA, the frequency of the data signal DATA is increased. After receiving the frame start signal STV, the output of the data signal of one frame is started. Within the effective timing period T1, the driving circuit 1 of the display panel outputs the data signal DATA according to the adjusted output frequency, thereby increasing the push frequency of the data signal DATA in the effective timing period T1, and improving the alternating frequency of the bright and dark lines. In the case of moving visual observation of the frame drop, no vertical bright and dark lines are observed, and since the charging time of the data signal DATA is compressed under the effective timing period T1, the difference in parasitic capacitance of the two pixel units 21 of the pixel unit group 22 is reduced, and the difference in pixel voltage of the two pixel units 21 becomes smaller, which further reduces the vertical bright and dark lines and improves the display effect.

[0068] For example, Figure 4 As shown, when the k value is 1.5, compared with the original initial output frequency of 60 Hz, the output frequency of the data signal DATA increases to 90 Hz, and the frequency of alternating light and dark lines is 45 Hz. In the case of moving visual observation of frame reduction, the frequency of the picture seen by the human eye is greater than 24 Hz, and no vertical light and dark lines are observed.

[0069] Correspondingly, in order to achieve column flipping, such as Figure 5 As shown, in an optional embodiment, the driving method of the display panel further includes:

[0070] S30, in the first driving mode, switching the polarity of the data signal DATA output to each column data line;

[0071] In the same frame scanning period, the polarities of two data lines in adjacent columns are opposite, and in adjacent frame scanning periods, the polarities of data lines in the same column are opposite.

[0072] When the invalid timing cycle T2 is increased, the pushing frequency of the data signal DATA is increased and the column flip is realized, that is, in the i-th frame time, Figure 1 As shown, the data signals DATA of the Nth, N+2, N+4, ... columns are negative polarity, and the data signals DATA of the N-1th, N+1, N+3, ... columns are positive polarity. In the i+1th frame time, as Figure 6 As shown, the data signals DATA in the Nth, N+2, N+4, ... columns are of positive polarity, and the data signals DATA in the N-1th, N+1, N+3, ... columns are of negative polarity.

[0073] During the same frame scanning process, the polarity of the data signal DATA in the same column remains unchanged. During row-by-row scanning, the pixel unit groups 22 cross-connected with the data lines are all of the same polarity. Overall, the data lines can achieve positive and negative polarity reversal by column reversal, and there is no need to change the polarity during the row scanning drive. Therefore, the voltage in each frame is constant, and there is no positive and negative polarity switching, which effectively improves the problems of vertical bright and dark lines, power consumption, and vertical signal interference.

[0074] Furthermore, in order to realize the progressive scanning of the display panel 2, in an optional embodiment, the driving method of the display panel further includes:

[0075] S60 , outputting a row scanning signal within the effective timing period T1 , wherein the output frequency of the row scanning signal is the same as the output frequency of the data signal DATA.

[0076] After increasing the push frequency of the data signal DATA, the charging time of each row of pixel units 21 becomes shorter, and the speed of switching from one row of pixel units 21 to the next adjacent row of pixel units 21 increases. Therefore, in order to match the output frequency and charging effect of the data signal DATA, while outputting the adjusted data signal DATA during the effective timing period T1, the row scanning signal is output row by row at the same output frequency, so that while the data signal DATA of each row is to be output, the thin film transistor inside each pixel unit 21 is effectively turned on, thereby receiving the data signal DATA of the corresponding output frequency, thereby performing charging and display for a corresponding period of time, ensuring the charging effect and improving the display effect.

[0077] Embodiment 2

[0078] In order to solve the problem of bright and dark lines, in another embodiment, the driving method of the display panel further includes:

[0079] S40, switching to the second working mode according to the trigger instruction, in the second driving mode, switching the polarity of the data signal DATA output to each column data line, wherein the plurality of columns of data lines are divided into n data line groups, each data line group includes m data lines with the same number of columns, and m is greater than 2;

[0080] In the i-th frame scanning period, the polarity of the data signal DATA of the first column data line of each data line group is the first polarity, and the polarity of the data signal DATA of the second column data line to the m-th column data line of each data line group is the second polarity, and the first polarity and the second polarity are opposite polarities;

[0081] In the i+1th frame scanning period, the polarity of the data signal DATA of the first column data line of each data line group is the second polarity, and the polarity of the data signal DATA of the second column data line to the mth column data line of each data line group is the first polarity, and i is a positive integer.

[0082] When outputting the data signal DATA in each frame, the original data signal DATA is flipped in such a way that the polarities of the data signals DATA of the data lines of the adjacent columns are opposite. When switching to the next frame, the polarities of the data signals DATA of the data lines of each column are switched, for example Figure 1 As shown, the pixel units 21 in the first column present bright lines, the pixel units 21 in the second column and the pixel units 21 in the third column present dark lines, the pixel units 21 in the fourth column and the pixel units 21 in the fifth column present dark lines, and so on, that is, vertical light and dark lines. If the bright column of pixel units 21 is characterized as A, and the dark column of pixel units 21 is characterized as B, according to the column flipping method, the light and dark stripes are arranged according to the ABBAABBAABB rule, and the light and dark contrast between each two adjacent columns is high. Macroscopically, very rough vertical light and dark stripes are displayed, which can be clearly perceived by the human eye.

[0083] To this end, in this embodiment, the flipping method of the data signal DATA is changed, and multiple columns of data lines are divided into n groups, each group includes m data lines, and among the m data lines in each group, the polarity of the data line in the previous column is opposite to the polarity of the data line in the next m-1 columns, and the polarity of the data lines in the next m-1 columns of each group is the same.

[0084] For example Figure 7 As shown, three columns of data lines are grouped together, that is, the polarities of the data lines of each data line group are respectively positive, negative, negative or negative, positive, and positive. In the i-th frame scanning period, the polarity of the data signal DATA of the first column of data lines of each data line group is negative, and the polarity of the data signal DATA of the second column of data lines and the third column of data lines of each data line group is positive. If the bright column of pixel units 21 is characterized as A and the dim column of pixel units 21 is characterized as B, according to the column flipping mode of the adjusted data signal DATA, the light and dark stripes are arranged irregularly according to BAAABABAAAAB, the vertically alternating light and dark stripes are irregular, and the light and dark stripes of each two adjacent columns are disrupted, which weakens the light and dark contrast of the two adjacent columns, and as shown Figure 7 The black frame portion shows that the brightness of some of the even-numbered adjacent pixel units 21 can offset each other to be equal in brightness, which can further improve the vertical bright and dark lines.

[0085] like Figure 8As shown, in the i+1th frame scanning period, the polarity of the data signal DATA of the first column of data lines in each data line group is positive, and the polarity of the data signal DATA of the second column of data lines and the third column of data lines in each data line group is negative. According to the column flipping mode of the adjusted data signal DATA, the light and dark stripes are irregularly arranged according to ABBBABABBBBA. From a macroscopic point of view, the vertically alternating light and dark stripes are irregular, and the light and dark stripes of each two adjacent columns are disrupted, which weakens the light and dark contrast of the two adjacent columns. Therefore, by changing the column flipping mode, the display of the light and dark lines is reduced, and the display effect of the display panel 2 is improved.

[0086] Or Fig. 9 As shown, four columns of data lines are grouped together, that is, the polarities of the data lines in each data line group are respectively positive-negative-negative-negative or negative-positive-positive-positive. In the i-th frame scanning period, the polarity of the data signal DATA of the first column of data lines in each data line group is negative, and the polarity of the data signal DATA of the second to fourth columns of data lines in each data line group is positive. If the bright column of pixel units 21 is characterized as A and the dim column of pixel units 21 is characterized as B, according to the column flipping mode of the adjusted data signal DATA, the light and dark stripes are irregularly arranged according to BAAABAABBABA. From a macroscopic point of view, the vertically alternating light and dark stripes are irregular, and the light and dark stripes of each two adjacent columns are disrupted, weakening the light and dark contrast of the two adjacent columns, and as shown Fig. 9 The black frame portion shows that the brightness of all adjacent even-numbered pixel units 21 can offset each other to be equal in brightness, which can further improve the vertical bright and dark lines.

[0087] like Fig.10 As shown, in the i+1th frame scanning period, the polarity of the data signal DATA of the first column data line of each data line group is positive, and the polarity of the data signal DATA of the second column data line to the fourth column data line of each data line group is negative. According to the column flipping mode of the adjusted data signal DATA, the light and dark stripes are irregularly arranged according to ABBBABBAABAB. From a macroscopic point of view, the vertically alternating light and dark stripes have no regularity and are weakened. Therefore, by changing the column flipping mode, the display of the light and dark lines is reduced, and the display effect of the display panel 2 is improved.

[0088] Furthermore, in order to realize the progressive scanning of the display panel 2, in an optional embodiment, the driving method of the display panel further includes:

[0089] S60 , outputting a row scanning signal within the effective timing period T1 , wherein the output frequency of the row scanning signal is the same as the output frequency of the data signal DATA.

[0090] In order to match the output frequency and charging effect of the data signal DATA, while the data signal DATA is output during the effective timing period T1, the row scanning signal is output row by row at the same output frequency, so that while the data signal DATA of each row is to be output, the thin film transistor inside each pixel unit 21 is effectively turned on, thereby receiving the data signal DATA of the corresponding output frequency, thereby performing charging and display for the corresponding length of time, ensuring the charging effect and improving the display effect.

[0091] Embodiment 3

[0092] In another optional embodiment, in order to solve the bright and dark line problem, the driving method of the display panel further includes:

[0093] S50, switching to the third working mode according to the trigger instruction, and in the third driving mode, switching the polarity of the data signal DATA output to each column data line, wherein the multiple columns of data lines are divided into n data line groups, each data line group includes m data lines, the m values ​​of the jth data line group to the j+Kth data line group are different, the m values ​​of the jth data line group and the j+K+1th data line group are equal, and j and K are positive integers;

[0094] In the i-th frame scanning period, the polarity of the data signal DATA of the first column data line of each data line group is the first polarity, and the polarity of the data signal DATA of the second column data line to the m-th column data line of each data line group is the second polarity, and the first polarity and the second polarity are opposite polarities;

[0095] In the i+1th frame scanning period, the polarity of the data signal DATA of the first column data line of each data line group is the second polarity, and the polarity of the data signal DATA of the second column data line to the mth column data line of each data line group is the first polarity, and i is a positive integer.

[0096] In this embodiment, the difference from the second embodiment is that the display panel 2 is divided into a plurality of large groups, each large group has the same number and polarity distribution of data lines, each large group includes K data line groups, and the K data line groups in each large group have different numbers of data lines, for example Fig.11 As shown, it is assumed that the data lines Dn-1 to Dn+12 are included, which is a large group. The number of data lines in another large group is also 14 and the polarity distribution is the same. One large group is divided into four small groups. The first data line group includes two data lines, the second data line group includes three data lines, the third data line group includes four data lines, and the fourth data line group includes five data line groups, wherein the first column of data lines in each data line group is of the first polarity, and the remaining columns of data lines in each data line group are of the second polarity.

[0097] During the i-th frame scanning cycle, the polarities of the data lines Dn-1 to Dn+12 are the first polarity, the second polarity, the first polarity, the second polarity, the second polarity, the first polarity, the second polarity, the second polarity, the second polarity, the first polarity, the second polarity, the second polarity, the second polarity, the first polarity, the second polarity, the second polarity, the second polarity and the second polarity respectively. According to the column flipping method of the adjusted data signal DATA, the light and dark stripes are arranged irregularly. From a macroscopic perspective, the vertical alternating light and dark stripes have no regularity, and the light and dark stripes between each two adjacent columns are disrupted, which weakens the light and dark contrast between the two adjacent columns and can improve the vertical light and dark lines.

[0098] Furthermore, in order to realize the progressive scanning of the display panel 2, in an optional embodiment, the driving method of the display panel further includes:

[0099] S60 , outputting a row scanning signal within the effective timing period T1 , wherein the output frequency of the row scanning signal is the same as the output frequency of the data signal DATA.

[0100] In order to match the output frequency and charging effect of the data signal DATA, while the data signal DATA is output during the effective timing period T1, the row scanning signal is output row by row at the same output frequency, so that while the data signal DATA of each row is to be output, the thin film transistor inside each pixel unit 21 is effectively turned on, thereby receiving the data signal DATA of the corresponding output frequency, thereby performing charging and display for the corresponding length of time, ensuring the charging effect and improving the display effect.

[0101] Embodiment 4

[0102] In the above embodiment, when outputting the row scanning signal, the problem of bright and dark lines is improved by changing the output frequency of the data signal DATA or the flipping mode. In order to further improve the display effect, in an optional embodiment, the driving method of the display panel further includes:

[0103] S70 , when outputting row scanning signals row by row, alternately switch the polarity of the data signal DATA on the same data line.

[0104] That is, when the scanning signal is output row by row, after each data signal DATA is output to a corresponding number of pixel units 21 in the same column, when the data signal DATA is output to the next column or another part of the pixel units 21 in the same column, the polarity of the data signal DATA is switched to achieve positive and negative color mixing and improve the display effect.

[0105] For example Fig.12As shown, assuming that the polarities of adjacent data lines are opposite, assuming that the polarities of the initial data lines are positive, negative, positive and negative respectively, the polarities of the data lines of each column are flipped when the row scanning signals are output row by row in a frame scanning cycle. After the end of a frame scan, the polarities of the pixel units 21 of adjacent rows in the same column are opposite, and the polarities of the two pixel units 21 connected to the same data line are opposite. Overall, brightness mixing under positive and negative polarities is achieved, the brightness difference is reduced, and the display effect is improved.

[0106] Embodiment 5

[0107] In order to further reduce vertical bright and dark lines and improve display effects, different working modes may be combined and performed simultaneously. In an optional embodiment, the driving method of the display panel further includes:

[0108] S80. Switch to the fourth working mode or the fifth working mode according to the trigger instruction, wherein the fourth working mode includes the first working mode and the second working mode, and the fifth working mode includes the first working mode and the third working mode.

[0109] In this embodiment, different trigger instructions can be output according to display requirements, and the driving circuit 1 of the display panel switches to one of the first working mode, the second working mode, the third working mode, the fourth working mode and the fifth working mode according to different trigger instructions, or when one of the working modes is selected in the current frame, another working mode is selected in the next frame.

[0110] Among them, the fourth working mode includes the first working mode and the second working mode, that is, increasing the duration of the invalid timing period T2 and increasing the push frequency of the data signal DATA. In the case of mobile visual observation of frame reduction, no vertical bright and dark lines will be observed, and since the charging time of the data signal DATA under the effective timing period T1 is compressed, the difference in parasitic capacitance between the two pixel units 21 of the pixel unit group 22 is reduced, and the difference in pixel voltage of the two pixel units 21 becomes smaller, thereby further reducing the vertical bright and dark lines.

[0111] At the same time, the flipping mode of the data signal DATA is changed, and the regular polarity flipping mode in the second embodiment is adopted, so that the bright and dark stripes are arranged irregularly, the bright and dark stripes are weakened, and the display effect of the display panel 2 is further improved.

[0112] And the fifth working mode includes the first working mode and the third working mode, that is, the length of the invalid timing period T2 is increased, and the push frequency of the data signal DATA is increased. In the case of mobile visual observation of frame reduction, no vertical bright and dark lines will be observed, and because the charging time of the data signal DATA is compressed under the effective timing period T1, the difference in parasitic capacitance between the two pixel units 21 of the pixel unit group 22 is reduced, and the difference in pixel voltage of the two pixel units 21 becomes smaller, thereby further reducing the vertical bright and dark lines.

[0113] At the same time, the flipping mode of the data signal DATA is changed, and the irregular polarity flipping mode in the third embodiment is adopted, so that the light and dark stripes are arranged irregularly, the light and dark stripes are weakened, and the display effect of the display panel 2 is further improved.

[0114] The trigger instruction may be output according to the user's selection, and may also be automatically switched according to the display effect of the current display panel 2. In an optional embodiment, the driving method of the display panel further includes:

[0115] S90 , obtaining picture information of the display panel 2 , and triggering and outputting different trigger instructions when the picture information is a pure color picture or a low grayscale picture, so as to switch the working mode of the display panel 2 .

[0116] In this embodiment, since the vertical light and dark lines are more obvious in pure color images or low grayscale images, in which the overall brightness of the display panel 2 is low under low grayscale, the vertical light and dark lines are more obvious. Therefore, the corresponding working mode can be selected according to the image information.

[0117] Among them, a brightness detection unit can be set to detect the picture information of the current display panel 2, or directly read the size of the data signal DATA output by the display panel 2 to determine the picture of the current display panel 2. When a pure color picture or a low grayscale picture is detected, different trigger instructions are output to control the driving circuit 1 of the display panel to switch to different working modes, and adjust the frequency and polarity of the data signal DATA, etc., so as to improve the vertical bright and dark line problem under the pure color picture or the low grayscale picture and improve the display effect.

[0118] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0119] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: for the display panel 2 of the HSD pixel array, in the driving method of the above-mentioned display panel, the first driving mode is switched according to the trigger instruction, and in the first driving mode, the proportion of the invalid timing period T2 and the valid timing period T1 in each frame scanning cycle is adjusted, the invalid timing period T2 is increased, and the output frequency of the data signal DATA is adjusted according to the proportion of the invalid timing period T2 and the valid timing period T1, and the data signal DATA is output according to the adjusted output frequency in the valid timing period T1, thereby increasing the push frequency of the data signal DATA in the valid timing period T1, and improving the alternation frequency of the bright and dark lines. In the case of moving visual observation of frame drop, vertical bright and dark lines will not be observed, and because the charging time of the data signal DATA in the effective timing period T1 is compressed, the difference in parasitic capacitance of the two pixel units 21 of the pixel unit group 22 is reduced, and the difference in pixel voltage of the two pixel units 21 becomes smaller, further reducing the vertical bright and dark lines.

[0120] Embodiment 6

[0121] A second aspect of an embodiment of the present invention provides a driving circuit 1 for a display panel, such as Figure 1 As shown, the display panel 2 includes a plurality of data lines, a plurality of scan lines and pixel units 21 arranged in an array, two adjacent pixel units 21 in the same row constitute a pixel unit group 22, adjacent pixel unit groups 22 are respectively connected to two adjacent data lines, two adjacent pixel units 21 in the same row are connected to the same data line and are respectively connected to two adjacent different scan lines, two diagonal pixel units 21 in two pixel unit groups 22 in the same column are respectively connected to two adjacent different scan lines, and two pixel units 21 in the same row separated by one pixel unit 21 are connected to the same scan line;

[0122] like Fig.13 As shown, the driving circuit 1 of the display panel includes a source driving circuit 300, a gate driving circuit 100 and a timing controller 200, the timing controller 200 is connected to the source driving circuit 300 and the gate driving circuit 100 respectively, the source driving circuit 300 is connected to a plurality of data lines of the display panel 2, and the gate driving circuit 100 is connected to a plurality of scanning lines of the display panel 2;

[0123] The timing controller 200 is used to control the gate driving circuit 100 and the source driving circuit 300 to implement the above display panel driving method.

[0124] Among them, the timing controller 200 is equipped with a memory, a processor, etc. The memory is used to store the relevant programs of the driving method of the above-mentioned display panel. After receiving the corresponding trigger instruction, the processor reads the corresponding control program from the memory, implements the corresponding driving method and switches to different working modes, and controls the gate driving circuit 100 to output row scanning signals to the display panel 2 line by line to realize frame scanning drive, and controls the source driving circuit 300 to output the data signal DATA of the corresponding output frequency and the corresponding polarity reversal mode to the display panel 2, and adjusts the frequency and polarity of the data signal DATA, so as to improve the vertical bright and dark line problems in pure color pictures or low grayscale pictures and improve the display effect.

[0125] Embodiment 7

[0126] The present invention further provides a display device, which includes a display panel 2 and a driving circuit 1 for the display panel. The specific structure of the driving circuit 1 for the display panel refers to the above embodiment. Since the display device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. The display panel 2 is connected to the driving circuit 1 of the display panel.

[0127] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for driving a display panel, characterized in that: The display panel comprises a plurality of data lines, a plurality of scan lines and pixel units arranged in an array, wherein two adjacent pixel units in a row constitute a pixel unit group, and the adjacent pixel unit groups are respectively connected to two adjacent data lines, and two adjacent pixel units in a row are connected to the same data line and are respectively connected to two adjacent different scan lines, and two diagonal pixel units in two pixel unit groups in the same column are respectively connected to two adjacent different scan lines, and two pixel units in the same row separated by one pixel unit are connected to the same scan line; The driving method of the display panel includes: According to the trigger instruction, the first driving mode is switched to, and in the first driving mode, the ratio of the invalid timing period to the valid timing period in each frame scanning period is adjusted, wherein the valid timing period is ahead of the invalid timing period, and the ratio of the invalid timing period to the valid timing period is k, 1 <k<2; The output frequency of the data signal is adjusted according to the ratio of the invalid timing period to the valid timing period, and the data signal is output according to the adjusted output frequency within the valid timing period, wherein the output frequency of the data signal is f=f0*k, wherein f is the initial frequency of the data signal.

2. The method for driving a display panel according to claim 1, wherein: The driving method of the display panel further includes: In the first driving mode, the polarity of the data signal output to each column data line is switched; In the same frame scanning period, the polarities of two data lines in adjacent columns are opposite, and in adjacent frame scanning periods, the polarities of the data lines in the same column are opposite.

3. The method for driving a display panel according to claim 1, wherein: The driving method of the display panel further includes: Switching to the second working mode according to the trigger instruction, in the second driving mode, switching the polarity of the data signal output to each column data line, wherein the plurality of columns of data lines are divided into n data line groups, each data line group includes m data lines with the same number of columns, and m is greater than 2; In the i-th frame scanning period, the polarity of the data signal of the first column data line of each data line group is the first polarity, the polarity of the data signal of the second column data line to the m-th column data line of each data line group is the second polarity, and the first polarity and the second polarity are opposite polarities; In the i+1th frame scanning period, the polarity of the data signal of the first column data line of each data line group is the second polarity, and the polarity of the data signal of the second column data line to the mth column data line of each data line group is the first polarity, and i is a positive integer.

4. The method for driving a display panel according to claim 3, wherein: The driving method of the display panel further includes: Switching to the third working mode according to the trigger instruction, and switching the polarity of the data signal output to each column data line in the third driving mode, wherein the multiple columns of data lines are divided into n data line groups, each data line group includes m data lines, the m values ​​of the jth data line group to the j+Kth data line group are different, the m values ​​of the jth data line group and the j+K+1th data line group are equal, and j and K are positive integers; In the i-th frame scanning period, the polarity of the data signal of the first column data line of each data line group is the first polarity, the polarity of the data signal of the second column data line to the m-th column data line of each data line group is the second polarity, and the first polarity and the second polarity are opposite polarities; In the i+1th frame scanning period, the polarity of the data signal of the first column data line of each data line group is the second polarity, and the polarity of the data signal of the second column data line to the mth column data line of each data line group is the first polarity, and i is a positive integer.

5. The method for driving a display panel according to any one of claims 1 to 4, characterized in that: The display panel driving method further includes: A row scanning signal is outputted within the effective timing period, wherein an output frequency of the row scanning signal is the same as an output frequency of the data signal.

6. The method for driving a display panel according to claim 5, wherein: The display panel driving method further includes: When the row scanning signal is output row by row, the polarity of the data signal on the same data line is switched alternately.

7. The method for driving a display panel according to claim 4, wherein: The display panel driving method further includes: Switch to the fourth working mode or the fifth working mode according to the trigger instruction, wherein the fourth working mode includes the first working mode and the second working mode, and the fifth working mode includes the first working mode and the third working mode.

8. The method for driving a display panel according to claim 7, wherein: The display panel driving method further includes: The picture information of the display panel is obtained, and when the picture information is a pure color picture or a low grayscale picture, different trigger instructions are triggered to output so as to switch the working mode of the display panel.

9. A driving circuit for a display panel, characterized in that: The display panel comprises a plurality of data lines, a plurality of scan lines and pixel units arranged in an array, wherein two adjacent pixel units in a row constitute a pixel unit group, and the adjacent pixel unit groups are respectively connected to two adjacent data lines, and two adjacent pixel units in a row are connected to the same data line and are respectively connected to two adjacent different scan lines, and two diagonal pixel units in two pixel unit groups in the same column are respectively connected to two adjacent different scan lines, and two pixel units in the same row separated by one pixel unit are connected to the same scan line; The driving circuit of the display panel includes a source driving circuit, a gate driving circuit and a timing controller, wherein the timing controller is connected to the source driving circuit and the gate driving circuit respectively, the source driving circuit is connected to a plurality of data lines of the display panel, and the gate driving circuit is connected to a plurality of scanning lines of the display panel; The timing controller is used to control the gate driving circuit and the source driving circuit to implement the display panel driving method according to any one of claims 1 to 8.

10. A display device, characterized in that: The invention comprises the display panel as claimed in claim 9 and a driving circuit of the display panel, wherein the display panel is connected to the driving circuit of the display panel.

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